Sylvania



June 7, 1927.

F- L. JAHN SCREEN Filed Nov. 19, 1925 Illi NA All n INVENTOR Mom.

Patented June 7, 1927.

UNITED STATES PATENT OFFICE.

FREDERICK L. JAHN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WATSON &

IVCCDANIEL C0., OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

sonnmv.

Application filed November 19, 1925. Serial No. 69,957.

My invention relates to a new and useful screen or strainer for pipe lines, conveying either steam, gas, water, oil or the like, and itis adapted to remove the dirt and scale from the fluid passing through the pipe, and is particularly adapted to be used in connection with steam traps and reducing valves, meters or. any apparatus which would be clogged or damaged by such dirt or scale; my novel strainer being placed in the pipe line in advance of such apparatus.

An object of my invention is to produce a strainer or screen for the purpose stated, which will offer the least resistance to the flow of the fluid therethrough and which will at the same time be self cleaning or which can be cleaned periodically without removal of the strainer from the pipe line.

Still another object of my invention is to produce a strainer for steam of the character stated, which will produce no pockets in the pipe line but will maintain such pipe line in its original condition thereby eliminating the settling of liquid within the pipe line, when the same is shut ofl.

With the above ends in view, my invention consists ofa cylindrical housing having a transverse inlet and a transverse outlet opening in alignment with each other and extending substantially at right angles to the cylindrical housing, a cylindrical screen adapted to fit within said cylindrical housing, said cylindrical housing being provided with internal ribs for supporting and spacing said screen.

My invention further consists of a cylindrical screen having a reinforcing rib extending longitudinally thereof, said-cylin- 1 drical screen being truncated at the upper portion thereof, opposed to said reinforcing rib, for the admission of the fluid into said cylinder, while the upper endof said rein-' forcing rib is bent outwardly and backupon itself, thereby providing anouter spacing projection, which is adapted to seat within a corresponding spacing recess in the housing, thereby to prevent the dislodging of the screen within the housing.

My invention further consists of a suitable threaded cap at the upper portion of the cylindrical housing, to permit the insertion and removal of the screen from the housing, and a lowerthreaded blow-01f opening at the bottom of said cylindrical housing, adapted to receive a suitable blow off valve or pet-cock through which the strainer or screen may be periodically cleaned. by blowing off.

For the. purpose of illustrating my invention, I have shown in the accompanying drawings forms thereof which are at present preferred by me, since they will give in practice satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described.

Referring to the drawings 2- Figure 1 represents a top plan view of a novel screen or strainer, embodying my invention.

Figure 2 represents a vertical section on line 22 of Figure 1, showing the internal construction of my novel screen or strainer.

Figure 3 represents a vertical section also on line 22 of Figure 1, showing the housing of my novel screen or strainer, with the upper cap or plug, the cylindrical screen and the lower blow-oflf plug removed.

Figure 4 represents a perspective View of the screen or strainer removed from the housing.

Figure 5 represents a-vertical section on line 55 of Figure 1, showing the detailed construction of the reinforcing rib of the screen;

Figure 6 represents a section on line 66 of Figure 4.

Referring to the drawings, in which like reference characters indicate. like parts, 1 designates the upright tubular or cylindrical casing or housing of my novel screen, having its upper end internally threaded, as at 2, and adapted to receive a suitable threaded plug or cap 3, and having its lower end provided with a relatively small inter nally threaded opening 4 for the reception of either a sediment plug 5, or a blow-01f valve or pet-cock, (not shown in the drawings), through which the sediment may be removed periodically by blowing off.

The internally threaded inlet opening 6, and the similarly threaded outlet opening 7, are provided in the upper portion of the tubular cylindrical casing 1, in alignment through the-housing.

'with each otherand at substantially a right angle to said cylindrical housing, thereby forming a straight fluid Each of the openings 6 and 7 are continued through suitable hexagonal projections of bosses 8 and. 9 respectively. The cylindrical screen or strainer proper 10, formed in the shape of a cylinder, has its overlapping edges bent over so as tointerlock with each other and to form a reinforcing rib 11 of multiple thickness, The'upperportion of thecy1indrical'screen is'then truncated along 'a curved plane,'shown by the line 12'. The

upper terminal of the reinforcing rib 11,'is

bent outwardly back upon itself so as to pro duce aslight projection 13 whereby said cylindrical screen may be retained in position against any rotation thereof.

The cyl-indrical screen is adapted to seat longitudinally within the cylindrical housing 1, as-shown in Figures 1 and 2 and 7 is centered within said hous ng and sup ported therein, against the "force of the moving liquid or fluid, by an upper supporting rib lt extending from the top of the outlet opening to the bottom 01 the inlet opening, and the lower longitudinal supporting or centering rib positioned directly below the outlet opening andhaving its terminals spaced a suitable distance from the upper rib; said two ribs being formed integral with the housing. The inner seating surfaces of the ribs 14 and 15 are cut cylindrical soas to provide accurate seating surfaces for the cylindrical screen 10. The recess 16 in the upper part of the upper rib 1 1, is adapted to receive the projection 13 of the screen 10, thereby to maintain said screen in fixed relationv to the housingand to prevent the" rotation thereof.

The fluid thus entering through the. inlet opening 6, in theglirection of the arrows 17,

p'asses through the upper truncated portion mg or strainer.

* tage wherea liquid is-apt to settle ,out of a gas, such as oil out of compressed gas and water outof steam, in ;whieh easesiany-ob stru'otion rising above. the pipeline olipipe cross section and forin ingzxa pocket, will "cause a gradual settlingofthealiquidewithin the pipe to the -l ieigh't of such obstruction or posited-thereby :also decreasing the =flow passageway the inner. surface .of. termed integral therewith, extendingirorn 7 Since the inlet and outlet openings are in the upper portionofthe cylindrical housing 1, the lower portion thereof forms a sediment chamber 18, which is below thelevel of the openin s-6 a d 7 and h ars the Se m will fall below the pipe line andout of the path of travel of the fluid. will also be noted that the upper rib 14 and the lower rib 15 are not continuous throughout a circle, but are separated with the passages 19 therebetween. This permits the passage of the fluid from the lower portion of .thelcylinder and the. SQCllHlBllb chamber 18, intoc-theoutlet opening. Thus, if. the flow of the1iq- V uid is excessive or it the upper portion :ofpthei screen becomes clogged, the fluid maytravel down through the cylindrical screen and pass through the lower portion of the screen in; v i

to the sediment chamber 18, and hence through the passageways19 into the outlet opening 7, thereby facilitating the passage of the fluid through the device even though the upper portion of the screen, in thediclogged. I 1

It will now be apparent that Thavedevised: a novel and useful construction in screens, which embodies the features of advantage enumerated as desirable in the statement of the invention and the/abov -rect path of the fluid, Jnay be slightly 7 description,and while I have, in the present instance, shown and described preferred forms thereof, which will give in practice satisfactory and reliable results, it is to be understood that such embodiments are susceptible otmodification in various particularswithout departing from the spirit or scope of the invention-or sacrificing any of its advantages.

Havingthus described my invention, what I claim as new, and desire to secure by Let ters Patent is q r 1. In a device fthe character stated, an elongated tubular housing having a fluid passageway extending transversely through the upper portion thereof at .substantiall-ya right angle thereto and ,infSubst-antially a straight path, a sediment chamber in Jthe lib";

lower portion ofsjaid tubular, housing below I the level of said'fiuid, passageway, an upper spacing and supporting" rib projecting trom the upper portion of theoutlet flIidgQi sai passageway to b116l101itQmpf the inlet end otsaid passager ay,;asubsm tially horizo vtal alower spacing and; supporting rib -,d-iirectly belowthe'flower levelof the fluidpassageway on the ,outletsidethereot, having itszterrninals spaced a .suitahleldistance jrom the "upper Spaeing. and supporting ri th hearing; surfaces of ;said two ribs .ey-

lindrical in tshape a d ubstant a ly e aa a with thetubular.hous ng;, 7 1 v f i2. 11 n a device ofithe. ,eharae eri tarted, a

housing and elongated tubular housing having a fluid passageway extending transversely through the upper portion thereof at substantially a right angle thereto and in substantially a straight path, a sediment chamber in the lower portion of said tubular housing below the level of said fluid passageway, an upper spacing and supporting rib projecting from the inner surface of said housing and formed integral therewith extending from the upper portion of the outlet end of said passageway to the bottom of the inlet end of said pas sageway, a substantially horizontal spacing and supporting rib, a lower horizontal spacing rib directly below the lower level of the fluid passageway on the outlet side thereof and having its terminals spaced a suitable distance from the upper spacing and sup porting rib; the bearing surfaces of said two ribs being cylindrical in shape and coaxial with the tubular housing, and an elongated tubular screen within said housing and supported axially with respect thereto by said spacing and supporting ribs; the upper edge of said tubular screen conforming substantially to the contour of the upper of said two spacing and supporting ribs.

8. In a device of the character stated, an elongated tubular housing, a fluid passageway extending transversely through the upper portion thereof substantially at a right angle thereto and in a substantially straight line, an elongated tubular screen within said housing having the upper edge thereof inclined from the top of the exit side of the fluid passageway to the bottom of the inlet side of said fluid passageway, and a laterally and outwardly projecting locking projection carried by the upper portion of said screen on the outlet side thereof and a corresponding recess in the inner surface of the housing for receiving said projection, thereby to lock said screen with respect. to said housing.

4. In a device of the character stated, an elongated tubular housing, a fluid passageway extending transversely through the upper portion thereof substantially at a right angle thereto and in substantially a straight line, an elongated tubular screen within said housing having the upper edge thereof inclined from the top of the exit side of the fluid passageway to the bottom of the inlet side of said fluid passageway, and a reinforcing rib extending longitudinally of said screen on the outlet side thereof, said rib having its upper end bent outwardly and back upon itself to form a locking projection and a corresponding recess in said housing to receive said locking projection.

5. In a device of the character stated, an elongated tubular housing having a fluid passageway extending transversely through the upper portion thereof at substantially a right angle thereto and substantially a straight path, a sediment chamber in the lower portion of said tubular housing below the level of said fluid passageway, an upper spacing and supporting rib projecting from the inner surface of said housing and formed integral therewith, extending from the upper portion of the outlet end of said passageway to the bottom of the inlet end of said passageway, a substantially horizontal spacing and supporting rib, a lower horizontal spacing rib directly below the level of the fluid passageway on the outlet side thereof, having its terminals spaced a suitable distance from the upper spacing and supporting rib; the bearing surfaces of said two ribs being cylindrical in shape and substantially coaxial with the tubular housing, and an elongated tubular screen within said housing, supported coaxially with respect thereto by said spacing and supporting ribs;

the upper edge of said tubular screen conforming substantially to the contour of the upper of said two spacing and supporting ribs, and a reinforcing rib extending longitudinally of said screen on the outlet side thereof; said rib having an end thereof bent outwardly and back upon itself to form a locking projection.

FREDERICK L. JAI'IN, 

